List the name of each customer that has a credit limit of $5,000 and is represented by Hui Tian. Find the sum of the balances for all customers represented by Rafael Campos. For each order, list the...

List the name of each customer that has a credit limit of $5,000 and is represented by Hui Tian.

Find the sum of the balances for all customers represented by Rafael Campos.

For each order, list the order number, order date, customer number, and customer name.